/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dac.h"
#include "dma.h"
#include "tim.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "math.h"
#include "oled.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t sin_data_updata = 0;
#if 0
	//????
	#define POINTS 256
	#define SCALE_FACTOR (4095.0 / 2)  // ????,?[-1, 1]???[0, 4095]
	#define OFFSET 2048                // ???,?[0, 4095]?????
	#define M_PI  3.14159265
 
	uint16_t sine_wave_u16[POINTS];
	int sine_wave[POINTS];
	void sina(void)
	{
		for (int i = 0; i < POINTS; i++)
		{
			double x = ((double) i / (POINTS - 1)) * 2 * M_PI;  // 0?2p????
			double sin_value = sin(x);  // ?????
			sine_wave[i] = (int) (SCALE_FACTOR * sin_value + OFFSET);  // ?????????0~4095??
			sine_wave_u16[i] = (uint16_t)sine_wave[i];
		}
	}
	
#else
	#define POINTS 256                             //??????
	#define MIN_VALUE 100                          //???????
	#define MAX_VALUE 4000                         //??????? 
	#define SCALE ((MAX_VALUE - MIN_VALUE) / 2.0)  
	#define OFFSET MIN_VALUE  
  #define M_PI  3.14159265
	
	uint16_t sine_wave_u16[POINTS];
	int sine_wave[POINTS]; 
	void sina(void) 
	{  
 		for (int i = 0; i < POINTS; i++) 
	    {  
			double x = ((double)i / (POINTS - 1)) * 2 * M_PI;  // ??????0?2p????  
			double sin_value = sin(x);  // ?????  
			sine_wave[i] = (int)((sin_value + 1) * SCALE + OFFSET);  // ?????????100~4000?? 
		    sine_wave_u16[i] = (uint16_t)sine_wave[i];	
		}  
	}
	
#endif
	
char Char(char tinyint){
	return (char)(tinyint + '0');
}

void triple_digit_to_string(uint num, char str[4]){
	if(num < 10){
		str[0] = ' ';
		str[1] = ' ';
		str[2] = Char(num);
	}
	else if(num < 100){
		str[0] = ' ';
		str[1] = Char(num / 10);
		str[2] = Char(num % 10);
	}
	else if(num < 1000){
		str[0] = Char(num / 100);
		str[1] = Char((num / 10) % 10);
		str[2] = Char(num % 10);
	}
	str[3] = 0;
}

void double_digit_to_string(uchar num, char str[3]){
	if(num < 10){
		str[0] = '0';
		str[1] = Char(num);
	}
	else if(num < 100){
		str[0] = Char(num / 10);
		str[1] = Char(num % 10);
	}
	str[2] = 0;
}

/**********************************************
	PA4<->DAC_OUT
	PD6<->SCL
	PD7<->SDA
**********************************************/
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
	uint8_t i;
	extern uint16_t user_hz;
	char freq_to_show[] = "Freq:        Hz", amp_to_show[] = "Amp: 0.0V-3.3V", freq_int[] = "000", freq_frac[] = "00";
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_DAC_Init();
  MX_TIM2_Init();
  /* USER CODE BEGIN 2 */
  sina();  //?????????
  HAL_TIM_Base_Start(&htim2);
  //HAL_DAC_Start(&hdac,DAC_CHANNEL_1);
  HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t *)sine_wave_u16, POINTS, DAC_ALIGN_12B_R);
	OLED_Init();
	OLED_Display_On();
	OLED_Clear();
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
		if(sin_data_updata) sina();
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		if(user_hz >= 1000){
			triple_digit_to_string(user_hz / 1000, freq_int);
			for(i=0;i<3;i++) freq_to_show[6+i] = freq_int[i];
			freq_to_show[9] = '.';
			double_digit_to_string((user_hz%1000)/10, freq_frac);
			for(i=0;i<2;i++) freq_to_show[10+i] = freq_frac[i];
			freq_to_show[12] = 'k';
		}
		else{
			triple_digit_to_string(user_hz, freq_int);
			for(i=0;i<3;i++) freq_to_show[9+i] = freq_int[i];
			freq_to_show[12] = ' ';
		}
		OLED_ShowString(8,0,"Sine Generator",16);
		OLED_ShowString(0,4,freq_to_show,16);
		OLED_ShowString(8,6,amp_to_show,16);	
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 168;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
